groundloop

I apologize if there is already an open thread on this topic, but I am having no luck. System: Js 330a alternator, taramps 8000.1 (being ran at 2ohm so roughly 5k rms), Rockford Fosgate R2-500x4, PRVA 2.4x DSP, 3 Napa Legend AGM 100ah batteries, dual Sundown X12v3s, Kenwood Excelon Double Din...